OnStar System Radio Frequency Modulator Unit Input Test
OnStar System Radio Frequency Modulator Unit Input Test1. Remove the rear seat (Refer to the P/N 61SZ305, for the items not shown).
2. Disconnect the 12P connectors from the OnStar system radio frequency modulator unit.
3. Inspect the connector and socket terminals to be sure they are all making good contact.
- If the terminals are bent, loose or corroded, repair them as necessary, and recheck the system.
- If the terminals look OK, make the following input tests at the connector.
- If any test indicates a problem, find and correct the cause, then recheck the system.
- If all the input tests prove OK, the control unit must be faulty; replace it.